Vedlevande lavar på döda grenar på levande träd i produktionsskog
Saproxylic lichens in managed forests have less substrate available than in unmanaged forests due to the shortage of dead wood. However, a suitable substrate for these lichens could be dead branches on living trees. To this date, there has not been any systematically collected data about the abunda...
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| Formato: | H1 |
| Lenguaje: | sueco Inglés |
| Publicado: |
SLU/Dept. of Ecology
2010
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| Materias: |
| _version_ | 1855570384554819584 |
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| author | Livén, Mathias |
| author_browse | Livén, Mathias |
| author_facet | Livén, Mathias |
| author_sort | Livén, Mathias |
| collection | Epsilon Archive for Student Projects |
| description | Saproxylic lichens in managed forests have less substrate available than in unmanaged forests due to the shortage of dead wood. However, a suitable substrate for these lichens could be dead branches on living trees. To this date, there has not been any systematically collected data about the
abundance of dead branches on living trees and the lichens growing on these branches in managed forests. The aim of this study was to see where dead branches were located on living trees of Pinus sylvestris and Picea abies, how large the surface area of these branches was and what lichens grew
of wood on these branches. The study was made in Finspång, Sweden, where 11 forest stands of P.sylvestris and P. abies were sampled. Data was collected from ground level to a height of 6 meters. P. sylvestris stands had a larger area of dead wood per dead branch than P. abies stands in the age
span of 20-60 years old. In the age span of 61-110 years, P. abies stands had a greater the area of dead wood per dead branch than the P. sylvestris stands. P. sylvestris in the age span older than 110 years old had no dead branches from the ground level up to 6 meters. P. abies stands older than 110 years had the same amount of dead branches and available substrate as the 61-110 age span. Multivariate analysis did not reveal any clear patterns in the composition of the lichen flora between different stands, between the tree species or between heights. Stands of the age span of 20-60 years had very few lichen occurrences and a low number of species found compared to the other age classes. |
| format | H1 |
| id | RepoSLU2082 |
| institution | Swedish University of Agricultural Sciences |
| language | swe Inglés |
| publishDate | 2010 |
| publishDateSort | 2010 |
| publisher | SLU/Dept. of Ecology |
| publisherStr | SLU/Dept. of Ecology |
| record_format | eprints |
| spelling | RepoSLU20822019-01-22T09:08:59Z Vedlevande lavar på döda grenar på levande träd i produktionsskog Saproxylic lichens on dead branches on living trees in managed forest Livén, Mathias lichens branches saproxylic managed forest Saproxylic lichens in managed forests have less substrate available than in unmanaged forests due to the shortage of dead wood. However, a suitable substrate for these lichens could be dead branches on living trees. To this date, there has not been any systematically collected data about the abundance of dead branches on living trees and the lichens growing on these branches in managed forests. The aim of this study was to see where dead branches were located on living trees of Pinus sylvestris and Picea abies, how large the surface area of these branches was and what lichens grew of wood on these branches. The study was made in Finspång, Sweden, where 11 forest stands of P.sylvestris and P. abies were sampled. Data was collected from ground level to a height of 6 meters. P. sylvestris stands had a larger area of dead wood per dead branch than P. abies stands in the age span of 20-60 years old. In the age span of 61-110 years, P. abies stands had a greater the area of dead wood per dead branch than the P. sylvestris stands. P. sylvestris in the age span older than 110 years old had no dead branches from the ground level up to 6 meters. P. abies stands older than 110 years had the same amount of dead branches and available substrate as the 61-110 age span. Multivariate analysis did not reveal any clear patterns in the composition of the lichen flora between different stands, between the tree species or between heights. Stands of the age span of 20-60 years had very few lichen occurrences and a low number of species found compared to the other age classes. Produktionsskogar har oftast en mindre mängd död ved än en naturskog. Ett substrat som skulle kunna vara lämpligt för vedlevande lavar är döda grenar på levande träd. Inga systematiska data finns insamlat om hur mycket döda grenar det finns på levande träd i produktionsskog eller vilka lavar som växer på de döda grenarna. Denna studie syftade till att studera var på trädet de döda grenarna sitter på levande träd av tall Pinus sylvestris och gran Picea abies, hur mycket ved det finns på de döda grenarna samt vilka lavarter som växer där och med vilken abundans de förekommer. Detta undersöktes från marknivå till 6 meter upp i trädet. Studien gjordes i Finspång där totalt elva bestånd ingick. Döda grenar på tall i åldersintervallet 20-60 år har ett högre medelvärde för vedarean än gran 20-60 år. Dock ändras detta förhållande i åldersintervall 61-110 år då gran 61-110 har en större vedarea per död gren än tall 61-110. Tall äldre än 110 år saknar döda grenar under 6 m medan gran äldre än 110 år liknar gran 61-110 år. När en mulitvariat-analys gjordes visade det inga tydliga skillnader i artsammansättningen av lavar mellan tall och gran. Det samma gällde artsammansättningen mellan olika miljövariabler såsom bestånd, höjdintervall och ålder. I bestånd i åldersintervall 20-60 hittades det få fynd av lavarter och dessa förekom även med en låg abundans. SLU/Dept. of Ecology 2010 H1 swe eng https://stud.epsilon.slu.se/2082/ |
| spellingShingle | lichens branches saproxylic managed forest Livén, Mathias Vedlevande lavar på döda grenar på levande träd i produktionsskog |
| title | Vedlevande lavar på döda grenar på levande träd i produktionsskog |
| title_full | Vedlevande lavar på döda grenar på levande träd i produktionsskog |
| title_fullStr | Vedlevande lavar på döda grenar på levande träd i produktionsskog |
| title_full_unstemmed | Vedlevande lavar på döda grenar på levande träd i produktionsskog |
| title_short | Vedlevande lavar på döda grenar på levande träd i produktionsskog |
| title_sort | vedlevande lavar på döda grenar på levande träd i produktionsskog |
| topic | lichens branches saproxylic managed forest |